168551513203 has 16 divisors (see below), whose sum is σ = 178047858240. Its totient is φ = 159239748096.

The previous prime is 168551513177. The next prime is 168551513227. The reversal of 168551513203 is 302315155861.

It is a cyclic number.

It is not a de Polignac number, because 168551513203 - 2²⁹ = 168014642291 is a prime.

It is a super-2 number, since 2×168551513203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168551513293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874101 + ... + 1961977.

It is an arithmetic number, because the mean of its divisors is an integer number (11127991140).

Almost surely, 2^168551513203 is an apocalyptic number.

168551513203 is a deficient number, since it is larger than the sum of its proper divisors (9496345037).

168551513203 is an equidigital number, since it uses as much as digits as its factorization.

168551513203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88926.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 168551513203 in words is "one hundred sixty-eight billion, five hundred fifty-one million, five hundred thirteen thousand, two hundred three".